期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
贺兰山东麓4个酿酒葡萄品种枝条抗寒性鉴定 被引量:19
1
作者 杨豫 张晓煜 +4 位作者 陈仁伟 丁琦 冯蕊 李芳红 范锦龙 《干旱区资源与环境》 CSSCI CSCD 北大核心 2021年第3期183-189,共7页
贺兰山东麓地区受季风和大陆性气候影响,冬季寒冷干燥,低温持续时间长,酿酒葡萄越冬冻害频繁发生,严重制约葡萄与葡萄酒产业的可持续发展。文中对贺兰山东麓产区主栽的4个酿酒葡萄品种枝条进行抗寒性鉴定,旨在对酿酒葡萄抗寒育种、优良... 贺兰山东麓地区受季风和大陆性气候影响,冬季寒冷干燥,低温持续时间长,酿酒葡萄越冬冻害频繁发生,严重制约葡萄与葡萄酒产业的可持续发展。文中对贺兰山东麓产区主栽的4个酿酒葡萄品种枝条进行抗寒性鉴定,旨在对酿酒葡萄抗寒育种、优良品种推广提供理论依据。文中以‘北红’‘威代尔’‘西拉’‘赤霞珠’一年生枝条为试验材料,以4℃下保存的样本为对照,模拟自然冷冻降温过程,设置-10℃、-15℃、-20℃、-25℃、-30℃五个低温处理梯度,对各处理中枝条的保护酶活性、MDA、可溶性糖、可溶性蛋白、枝条萌芽率以及相对电导率、LT50进行测定及计算,运用相关性分析与隶属函数法对不同品种酿酒葡萄抗寒性进行综合评价。结果表明:‘北红’‘威代尔’‘赤霞珠’‘西拉’4种酿酒葡萄枝条半致死温度分别为-29.57℃、-27.26℃、-23.99℃、-14.10℃。相关分析结果表明,相对电导率、CAT活性、MDA、可溶性糖、可溶性蛋白含量与抗寒性呈负相关关系,枝条萌芽率、SOD、POD活性与抗寒性呈正相关关系。恢复生长法、LT50可作为判断酿酒葡萄枝条抗寒性强弱的单项指标。4种酿酒葡萄枝条抗寒性强弱顺序为‘北红’‘威代尔’‘赤霞珠’‘西拉’。 展开更多
关键词 酿酒葡萄 枝条 抗寒性 半致死温度 隶属函数法 保护酶 评价
原文传递
Drifting model approach to modeling based on weighted support vector machines 被引量:1
2
作者 fengrui SongChunlin ShaoHuihe 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2004年第4期610-614,共5页
This paper proposes a novel drifting modeling (DM) method. Briefly, we first employ an improved SVMs algorithm named weighted support vector machines (W.SVMs), which is suitable for locally learning, and then the DM m... This paper proposes a novel drifting modeling (DM) method. Briefly, we first employ an improved SVMs algorithm named weighted support vector machines (W.SVMs), which is suitable for locally learning, and then the DM method using the algorithm is proposed. By applying the proposed modeling method to Fluidized Catalytic Cracking Unit (FCCU), the simulation results show that the property of this proposed approach is superior to global modeling method based on standard SVMs. 展开更多
在线阅读 下载PDF
Measures for the Application of Geological Structure and Hydrogeological Characteristics to Solid Mineral Exploration
3
作者 fengrui 《外文科技期刊数据库(文摘版)工程技术》 2022年第9期072-075,共4页
Under the current background, the type, growth and production of solid minerals can be accurately grasped in the exploration of solid minerals. Therefore, it is necessary to pay attention to the exploration of solid m... Under the current background, the type, growth and production of solid minerals can be accurately grasped in the exploration of solid minerals. Therefore, it is necessary to pay attention to the exploration of solid minerals, analyze the characteristics of geological structure and hydrogeology in detail, and conduct scientific and effective analysis through scientific and effective analysis. Obtain valuable data to provide support for the development of mineral mining work, improve the utilization rate of mineral resources, reduce the incidence of mining accidents, and make mineral mining scientific and effective. 展开更多
关键词 geological structure hydrogeological features solid mineral exploration
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部